This paper aims to evaluate the Pottery Water Wall in a hot arid climate using CFD simulation. The Pottery Water Wall is a passive system and an upgrade to the Water Wall. The Pottery Water Wall is a combination of a Water Wall and Porous Ceramic Pipes for evaporative cooling. First, the study will evaluate the efficiency of the Pottery Water Wall in cooling and heating in the most extreme climatic conditions of winter and summer in Luxor, Egypt. This study will aid determining the ability of the Pottery Water Wall to cool and heat buildings and its ability to achieve thermal comfort. The study found that the Pottery Water Wall's cooling ability ranges between 4°C to 10°C, while its heating ability ranges between 4°C to 15°C. The Pottery Water Wall achieved thermal comfort for 62.5% of a day resembling extreme summer and achieved thermal comfort 62.5% of a day resembling extreme winter. In conclusion, the Pottery Water Wall can reduce cooling and heating demand by 88% at the extreme climatic conditions of Luxor, Egypt.